A beautiful shot. I think the lighting and dof are great. The only thing I can see that I might change is the "half" dancer on the right. Just my opinion, and take it for what it's worth. Great shot though.

Lovely girl. Lovely outfit. Exposure and focus look perfect. Such a pity her hand got cut off...
Her outfit looks kind of Swedish - and you saw and photographed her in Ireland? Did you go to an international folk dance meeting in your country?